The Vertebrates, Which Include Organisms Such as Humans, Birds, and Frogs

The vertebrates, which include organisms such as humans, birds, and frogs, illustrate that very different forms can evolve from one basic body plan. The observation that these diverse organisms share a general body plan supports the hypothesis that

A) they may simply be different variations of the same species.
B) evolution discovers and produces the most useful features for a given point in time.
C) they form a lineage that began with a common ancestor.
D) highly adaptive traits have a high probability of evolving independently within otherwise unrelated groups.

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